Beam-column in-plane resistance based on the concept of equivalent geometric imperfections

• Autorzy: Giżejowski M. A. , Szczerba R. B. , Gajewski M. D. , Stachura Z.

Identyfikatory

DOI

10.1515/ace-2015-0108

Warianty tytułu

PL

Nośność elementów stalowych ściskanych i zginanych bez zwichrzenia na podstawie koncepcji równoważnych imperfekcji geometrycznych

• Języki publikacji: EN

Abstrakty

EN

Assessment of the flexural buckling resistance of bisymmetrical I-section beam-columns using FEM is widely discussed in the paper with regard to their imperfect model. The concept of equivalent geometric imperfections is applied in compliance with the so-called Eurocode’s general method. Various imperfection profiles are considered. The global effect of imperfections on the real compression members behaviour is illustrated by the comparison of imperfect beam-columns resistance and the resistance of their perfect counterparts. Numerous FEM simulations with regard to the stability behaviour of laterally and torsionally restrained steel structural elements of hot-rolled wide flange HEB section subjected to both compression and bending about the major or minor principal axes were performed. Geometrically and materially nonlinear analyses, GMNA for perfect structural elements and GMNIA for imperfect ones, preceded by LBA for the initial curvature evaluation of imperfect member configuration prior to loading were carried out. Numerical modelling and simulations were conducted with use of ABAQUS/Standard program. FEM results are compared with those obtained using the Eurocode’s interaction criteria of Method 1 and 2. Concluding remarks with regard to a necessity of equivalent imperfection profiles inclusion in modelling of the in-plane resistance of compression members are presented.

PL

W artykule przedstawiono obszerne studium numeryczne dotyczące wpływu kształtu i amplitudy imperfekcji o charakterze geometrycznym na nośność swobodnie podpartych elementów ściskanych i zginanych bez zwichrzenia o przekrojach dwuteowych bisymetrycznych walcowanych typu HEB. Imperfekcje przyjęto zgodnie z koncepcją równoważnych imperfekcji geometrycznych (która ujmuje zbiorczo zarówno wpływ losowych imperfekcji geometrycznych jak również materiałowych różnych typów) w odniesieniu do tak zwanej eurokodowej metody ogólnej [11].

Słowa kluczowe

EN

steel I-section; bending; compressing; beam-column; load bearing capacity; flexural buckling resistance; equivalent imperfections; geometric imperfections; FEM modelling

PL

dwuteownik stalowy; zginanie; ściskanie; belka-słup; nośność; odporność na wyboczenie giętne; imperfekcja geometryczna; imperfekcja równoważna; modelowanie FEM

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2016
• Tom: Vol. 62, nr 4/II
• Strony: 35--71
• Opis fizyczny: Bibliogr. 36 poz., il., tab.

Twórcy

autor

Giżejowski M. A.

• Warsaw University of Technology, Faculty of Civil Engineering, Warsaw, Poland

autor

Szczerba R. B.

• Warsaw University of Technology, Faculty of Civil Engineering, Warsaw, Poland

autor

Gajewski M. D.

• Warsaw University of Technology, Faculty of Civil Engineering, Warsaw, Poland

autor

Stachura Z.

• Warsaw University of Technology, Faculty of Civil Engineering, Warsaw, Poland

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